Safety-guard for printing-machines.



L. E. MORRISON.

SAFETY. GUARD FOR PRINTING MACHINES.

APPLICATION FILED 05c. I8. m4.

Patented Oct. 12, 1915.

2 SHEETS-SHEET 1.

L. E. MORRISON.

SAFETY GUARD FOR PRINTING MACHINES.

APPLICATION FILED DEC. 18. I9l4. 1,156,423. Patented 0ct.12, 1915.

2 SHEETS-SHEET 2 (J n we nfoz RM S .9 g i m.

mm Mag Jada/ UNITED STATES- OFFICE.

LEWIS E. MORRISON, OF NEW JERSEY, ASSIGN'OR TO HUMANA COMPANY, A

. CORPORATION OF NEW JERSEY.

SAFETY-GUARD FOR PRINTING-MACHINES.

To all whom it may concern: v v I Be it known that I, LEWIS E. Moniusou, 'a citizen of the United States of Americaiand a resident of Newark, Essex county,'*fNew Jersey, have invented certain new and useful Improvements in Safety-Guards for Printing-Machines, of which the following isa'r caughtbetweenthe fixed and movable jaw or thefo'rmrniember and the platen. It is specification. v I

This lnvention relates to improvements in safety guards for printing machines and the object of the invention is to provide a safety guard particularly well adapted. for use on a platen press, cutting, embossing or other machine operated on the principle of the chines for different purposes operated in a similar manner.

With the above and other objects in view the invention is embodied in a safety guard as set forth hereinand as illustrated in the accompanying drawings in which Figure 1 is a side view of, a machine representing diagrammatically a Golding platen press, or other machine operated on a like principle, and equipped with a safety guard embodying the principle of this invention; in this figure the press is shown open. Fig. 2 is a similar View showing the press closed. Fig. 3 is a view of the platen and the guard and Fig. 4 is a detail view showing a modification relating to the guard.

Referring to Figs. 1 and 2 the frame of the press or other machine is marked 5, and 6 is the stationary form member or jaw. 7 is the platen ormov'able jaw which swings or oscillates on a shaft 8 by means of a rocker arm 9. Theplaten is operated by means of the toggle links 10 and 11 which are actuated by a suitable member or link 12. Preferably, and as is-well known, the link 12 is operated a from the main shaft of the press by a crank,

not shown. For the purposes of this disclosure the toggles 10 and 11 constitute a means for operating the platen. 13 is an arm con necting the platen to the toggle link 10. On each side of the press there is also an arm 14 which may be called an impression arm hereinafter, because it extends from the back impression shaft 50 to the front impression Specification of Letters Patent.

shaft 15 on which latter the arm 13 and toggle link 10 are journaled. 'During the paper to be printed, is placed and removed from the platen by the operator, whose hand or, hands :are frequently injured by being therefore the object of this invention to pro 1 vide ,a safety guard to prevent such accident andso arranged thatitlmaybe secured to the machine without necessitating'any changes in the constructionthereof.- Preferably the guard is in the formiof a bar or member which is moved acrossthe position of the operators hand while feeding the material to the machine and whereby the operators hand is forcibly prevented frombeing caught in ,thenachine'as the movable jaw closes upon the 'fixed jaw. In providing such a guard it is necessary or at least very desirable that it be so constructed and operated that the operator is allowed very nearly, or fully, as much time in which to feed the machine as he had without using the guard. Another consideration is that the guard must not interfere with the operation of the press, but is so arranged that only when the operator is slow in withdrawing his hand or careless does the guard move his hand away from danger. The guard Fig. 3 comprises a cross bar 20 preferably a piece of tubing and two? side bars. Each side bar comprises an outer'tube 21, secured to the cross bar, and aninner tube 22 pivoted to the impression arms 14 aforesaid by means of a bracket 23 suitably.

secured to said arms 14, one on each side of the platen. The tube 22 slides within the hereinafter explained and similarly 'there Patented Oct. 12, 1915."

Application filed December 18,1914. Seria1 No.877,8 50.

ioo

may be provided a shoulder 29 on the tubes 22 adapted to abut the lower ends 30 of the tubes 21. The aforementioned stops maybe formed or constructed in any suitable man: ner. The guides 25 are pivoted or swiveled v 7 o 1 platen moves toward the'form it will beobsr in brackets 31 secured to the corners ofthe platen as shown.

It will be seen that in'the open position in 1 Fig. lthe guard is loweredz with *the' bplaten, and does not interfere with the feedingof the. paper, also that the cross bar 20 is pulled down andkept down by the aforesaid springs 24, and the shoulder 27 abuttlng the edge '28 as above mentioned furnishes a convenient stop for-the cross bar 20. "Asthe served thiitir ,ergua-rd does not risewithiesp'ect *to'ithefiplatefiiuntil the lower-edge 30, on thefltn'be 21'iabuts the shoulder 29 o n the innertube'2'2, as shownin dotted lines, which 'occurs'""a t', about thetime the grippers I6 close andiwhen the operator isthroughfeed-- ing the sheet'andshould withdraw his' hand. As the platen now continues :its movementand the impression arms 14 also swings upwardly, the vguard is caused to rise above the platen until',it'"'reaches its highest position when the impression ison as shown in Fig. 2. ,During the latter part of the closing movement of the platen the cross bar describes a curve indicated at which is directly-across' the position of the operators hand and it followsthat the hand will be forcibly moved away from the platen and accidents prevented. It also follows that on the opening movement of the platen, the

guard is loweredin time so that when the grippers commence to open, the guard is out of the way and does not obstruct the subsequent manipulations of the stock. As a further precaution against accidents which might occur were the operator to attempt to seize a misplaced sheet or for any other reason attempt to thrust his hand forward be', low the cross bar and above the platen,there is secured to said cross bar a pieceof canvas 36, the lower edgeofwhich is" secured to alji roller 01' rod 37 secured to the. back of the" platen.. It is sufiicient to guard. against accident that the canvas is secured so as to 1 cover up the space between the platen and cross bar when the guard is raised, and the canvas will then bend "into 7 natural folds when the guard is 'down; It may, however, be desirable that the canvas be taut when the guard is up and for thispurpose thekroller 37 maybeaspringshade roller as indicated at'38iin Fig. 3, so that the canvas will roll up as the guard is lowered. Or it maybe suflicientto attach tothe. canvas oneor more strips ofelastic material 40 as in Fig. 4 and which insures that the canvas folds back of the filaten when the guard is lowered. Other, means for this purpose maybe employed to" I prevent the canvas from'folding-in 'onthd ,plateii i and thereby obstruct the manipula tion o fthe-material acted uponbythe press, or 'ast'ifi' guarding member may'fbe used, in. lace-Kai. the "canvas. I

f'lhei'iivention as illustratedand describedment.

is not limited to the precise details disclosed, and I intend the appended claims to include suchmodifications as will embody the principles of the invention. The dimensions and shape of the guard securing means and of the guard itself may vary dependent upon the precise form of the machine upon which it is to be used.

"With reference to the grippers '16 it will be understood' that the movement of the guard is not timed iexclusiv'ely with respect to said grippers", i which are referred to only by Way, of illustration, but that the movementof the g ard jis timed with respect to the operation of the machine and withthe 'viewsf-ofgiving'perfect safety andnot obstruct the operators; work. The operation fof platen press grippers is so well known that no description or illustration thereof is Y necessary.

and movable members cooperating therewith, said guard comprising a hand lifting cross bar and collapsible side bars secured to said platen and carrying said cross bar and secured to said movable members, whereby said cross bar ,is moved across the position the operators hand as said platen closes. 3. The combination with a movable fplaten', of a-lguard mounted onsaid platen land'adapte dto be raised and lowered with ifrespecttoj the same during the'movement thereof,fnieans for operating said guard, collaps'ible, side bars for thelatter and cooperating stops'formedonsaid collapsible side bars for maintaining the "guard in its relative position to the said'platen for aipredetermined length of time during the lclosing movement ofthe saidplatenr 1' 4. 'The combination with a}. movable. platen, of a.guard -;mounted on said platen land adapted tdbiraised' above the same during the closing movement thereof, collapsi ble side bars carrying said guard and provided with cooperating stops for preventing the g'uard from rising during the first part of the movement of the platen, said collapsibleiside bars serving as a means for operatingsaid guard'toreach its highest position as the'said platen'completes its closing move- 5. A guard for printing presses or similar machines having a movable platen or jaw and'movable operating members therefor,

said guard comprising a hand lifting cross said two elements when the said cross bar is 10 bar and collapsible side bars carrying said lifted by the said collapsible side bars.

cross bar and pivoted to the said platen and Signed at Newark, N. J. this 16th day of the said movable operating members there- December, 1914.

for, whereb said cross bar is moved across the position of the operator's hand as said LEVIS MORRISON platen closes and a flexible guarding mem- Witnesses:

ber secured to said cross bar and said platen STEPHEN HAINES PLUM, 2d,

and adapted to cover the space between the RICHARD BALDRANS DEAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

